Job Market Context
Rate this article:
Sally bounds up the stairs two at a time. She fumbles with the key, then bursts into the lab. With fingers still frozen from the morning air, she takes a tray of hockey-puck-size clear plastic cups out of an incubator. The cups contain fish embryos and water. She drops some of the fluid onto a slide and looks through the microscope. There they are, little spheres with dark paisley inlays. These particular fish are growing without hearts because Sally knocked out a gene fish need to grow hearts. She can now study this missing gene by watching what doesn't happen in its absence. She had to get the fish out of the incubator at exactly this stage of development -- just as the organs are forming, but before these fishlings die when they discover they ...